Valve structure and oxygen bomb device

Abstract

The utility model discloses a valve structure and an oxygen bomb device, and belongs to the field of heat measurement. The valve structure comprises an inner seal, a first valve and a second valve. A first through hole and a second through hole are formed in the inner seal; the first valve comprises a first valve body installed in the first through hole in a sealed mode and a first valve element which is arranged in the first valve body and is of a needle-shaped structure. The second valve comprises a second valve body installed in the second through hole in a sealed mode and a second valve element which is arranged in the second valve body and is of a rod-shaped structure. And the fluid conduction directions of the second valve and the first valve are opposite. According to the utility model, the gas inlet valve and the gas outlet valve are designed in a split manner, and the second valve adopts the valve rod as a transmission mechanism of the whole valve body, so that the accurate and controllable oxygenation flow is realized on the basis of ensuring the gas tightness; the second valve adopts a needle valve as a flow control means, the flow can be accurately controlled by moving the needle valve up and down, and the airflow can be continuously and finely adjusted.

Description

Technical Field

[0001] The utility model belongs to the field of heat measurement, in particular to a valve structure and an oxygen bomb device. Background Technique

[0002] At present, the inlet and outlet valves applied to domestic low-pressure oxygen bombs in China are the only one-way valve design, mainly used for oxygen filling and gas release. The materials are generally aluminum alloy or nickel-chromium alloy steel with better corrosion resistance. The domestic oxygen bombs generally have a pressure resistance of about 20 Mpa. During the oxygen filling and gas release process, the one-way valves made of these two materials can generally meet the strength requirements when the pressure in the cylinder does not exceed this range. However, if a combustion heat test of high-energy materials is to be carried out, the sealing performance, stability and safety of the valve for gas inlet and outlet cannot be guaranteed.

[0003] After long-term research by the applicant, it is found that the existing valve structure has the following problems: 1. The existing oxygen bomb nut is only a single one-way valve, which is likely to cause unstable air pressure in the cylinder during oxygen filling and gas release; 2. The valve structure of the existing oxygen bomb is simple and cannot meet the combustion test of high-energy materials. The overly simple structure may cause the valve to be damaged and the sealing performance cannot be guaranteed; 3. The material strength selected in the existing valve design is insufficient and the combustion test under high-pressure environment in the cylinder cannot be carried out; 4. The installation of accessories of the existing oxygen bomb is relatively difficult and a adapter is required. When multiple parameter data need to be obtained, it cannot be adjusted in time according to the feedback of the accessories. Content of the Utility Model

[0004] In order to overcome the above technical defects, the utility model provides a valve structure and an oxygen bomb device to solve the problems involved in the background technique.

[0005] The utility model provides a valve structure, including: an inner enclosure, on which a first through hole and a second through hole are provided; a first valve, the first valve includes a first valve body sealed and installed in the first through hole, and a first valve core arranged inside the first valve body and having a needle-like structure; a second valve, the second valve includes a second valve body sealed and installed in the second through hole, and a second valve core arranged inside the second valve body and having a rod-like structure; and the second valve is a one-way valve, and the fluid conduction direction is opposite to that of the first valve.

[0006] Preferably, the first valve body includes: a first valve seat screwed into the first through hole, a second valve seat screwed above the first valve seat, a compression nut screwed on the second valve seat, a first accommodation space formed inside the first valve seat, the second valve group and the compression nut, and a first connection end surface located at the bottom of the first accommodation space and having a gradually changing inner diameter.

[0007] Preferably, the first valve core passes through the compression nut and can abut against the first connection end face; an air passage is provided in the first valve core and extends to the outside.

[0008] Preferably, a first sealing ring is provided between the first valve core and the compression nut, and a second sealing ring is provided between the first valve core and the upper part of the first connection end face.

[0009] Preferably, an operating member is fixedly installed on the top of the first valve core, and the operating member can drive the first valve core to move up and down.

[0010] Preferably, the second valve body includes: a third valve seat screwed into the second through hole, a adapter screwed above the third valve seat, a limiting block screwed on the adapter, a second accommodating space formed inside the third valve seat, the adapter and the limiting block, and a second connection end face located in the upper part of the second accommodating space with a gradually changing inner diameter.

[0011] Preferably, the second valve core is arranged in the second accommodating space, is in clearance fit with the inner wall of the second accommodating space and can abut against the second connection end face; an elastic member is provided between the second valve core and the third valve seat, so that the second valve core abuts against the second connection end face.

[0012] Preferably, a third sealing ring is provided between the adapter and the third valve group, and a fourth sealing ring is provided between the second valve core and the third valve seat; an oxygen filling ferrule joint is also provided at the top of the limiting block.

[0013] Preferably, both the first through hole and the second through hole are stepped holes, and gaskets are also provided between the first valve body and the first through hole, and between the second valve body and the second through hole.

[0014] The present invention also provides an oxygen bomb device, including the valve structure described above.

[0015] The present invention relates to a valve structure and an oxygen bomb device, and compared with the prior art, has the following beneficial effects:

[0016] 1. The present invention separates the design of the intake valve and the exhaust valve, that is, the second valve and the first valve. On the one hand, the pressure resistance of the entire valve structure is stronger and can withstand a pressure of 60 Mpa; on the other hand, the charging and discharging valve is divided into two one-way valves to form a control loop. While charging and discharging gas, accessories such as a pressure gauge can be externally connected on the other side, and the gas flow rate can be adjusted according to the feedback on the accessory according to the situation inside the cylinder.

[0017] 2. Both the first valve and the second valve are installed in a multi-layer series connection manner. The second valve uses the valve stem as the transmission mechanism of the entire valve body, achieving precise control of the oxygen filling flow while ensuring gas tightness. The first valve uses a needle valve as a means of controlling the flow, and the flow rate can be precisely controlled by moving it up and down, enabling continuous and fine adjustment of the air flow.

[0018] In summary, the present utility model is a valve structure applied to the charging and discharging design of a high-pressure oxygen bomb, and is used in combination with a high-pressure oxygen bomb with a pressure resistance of 60 Mpa. The test efficiency is improved while ensuring gas tightness, and the safety of the operator can also be well guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present utility model.

[0020] Figure 2 is a schematic structural diagram of the present utility model.

[0021] The reference numerals are: 1. Inner enclosure; 12. First through hole; 13. Second through hole; 14. Gasket;

[0022] 2. First valve; 211. First valve seat; 212. Second valve seat; 213. Compression nut; 214. First accommodation space; 22. First valve core; 221. Air passage; 23. First sealing ring; 24. Second sealing ring; 25. Operating member;

[0023] 3. Second valve; 311. Third valve seat; 312. Adapter; 313. Limit block; 314. Second accommodation space; 321. Second valve core; 322. Elastic member; 33. Third sealing ring; 34. Fourth sealing ring; 35. Oxygen filling ferrule joint. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In the following description, a large number of specific details are given to provide a more thorough understanding of the present utility model. However, it is obvious to those skilled in the art that the present utility model can be implemented without one or more of these details. In other examples, some well-known technical features are not described to avoid confusion with the present utility model.

[0025] Refer to the attached Figure 1 、attached Figure 2, a valve structure applied to an oxygen bomb device, the valve structure includes: an inner enclosure 1, a first valve 2 and a second valve 3. The inner enclosure 1 is hermetically connected to the end cover of the oxygen bomb device, and a first through hole 12 and a second through hole 13 are provided on the inner enclosure 1. Both the first through hole 12 and the second through hole 13 are stepped holes. The first valve 2 and the second valve 3 are respectively installed in the first through hole 12 and the second through hole 13. In order to eliminate machining errors, gaskets 14 are also provided between the first valve body and the first through hole 12, and between the second valve body and the second through hole 13.

[0026] The first valve 2 includes a first valve body hermetically installed in the first through hole 12, and a first valve core 22 arranged inside the first valve body and having a needle-like structure; the second valve 3 includes a second valve body hermetically installed in the second through hole 13, and a second valve core 321 arranged inside the second valve body and having a rod-like structure; and the fluid conduction direction of the second valve 3 is opposite to that of the first valve 2.

[0027] In this embodiment, the intake valve and the exhaust valve are designed separately. The intake valve and the exhaust valve respectively correspond to the second valve 3 and the first valve 2 in this embodiment. On the one hand, the pressure resistance of the entire valve structure is stronger and can withstand a pressure of 60 Mpa; on the other hand, the charging and discharging valves are divided into two control circuits. While charging, the first valve 2 can be externally connected with accessories, such as a pressure gauge, etc., and the gas flow rate can be adjusted according to the feedback on the accessory according to the situation inside the oxygen bomb device.

[0028] At the same time, both the first valve 2 and the second valve 3 are installed in a multi-layer series connection manner. The second valve 3 is a one-way valve, and a valve rod is used as the transmission mechanism of the entire valve body. On the basis of ensuring gas tightness, the oxygen filling flow rate is accurately controllable. The second valve 3 uses a needle valve as a means of controlling the flow rate, and the flow rate can be accurately controlled by moving it up and down, and continuous and fine adjustment of the air flow can be achieved.

[0029] Refer to the appendix Figure 2 , the first valve body includes: a first valve seat 211 screwed into the first through hole 12, a second valve seat 212 screwed above the first valve seat 211, a compression nut 213 screwed on the second valve seat 212, a first accommodation space 214 formed inside the first valve seat 211, the second valve group and the compression nut, and a first connection end surface located at the bottom of the first accommodation space 214 and having a gradually changing inner diameter. The first valve core 22 passes through the compression nut 213 and can abut against the first connection end surface. A gas passage 221 is provided inside the valve needle portion and the valve needle seat and extends to the outside.

[0030] Moreover, an operating member 25 is fixedly installed on the top of the first valve core 22, and the operating member 25 can drive the first valve core 22 to move up and down. The operating member 25 can be a hand-twist knob or an electric control operating rod, and in this embodiment, it is a hand-twist knob. The first connection end face is in an inverted V shape. By controlling the position of the first valve core 22 relative to the first connection end face through the hole of the operating member 25, the accurate control of the flow rate during the up and down movement is realized, and the continuous and fine adjustment of the air flow can be achieved.

[0031] A first sealing ring 23 is arranged between the valve needle seat and the compression nut 213, and a second sealing ring 24 is arranged between the valve needle part and the upper part of the first connection end face. When the first valve core 22 is installed, an O-ring or a sealing washer is installed as the first sealing ring 23 and the second sealing ring 24 when installed with the inflation valve seat, ensuring the accurate control of the flow rate on the basis of ensuring the gas tightness.

[0032] Refer to the appendix Figure 2 The second valve body includes: a third valve seat 311 screwed into the second through hole 13, a swivel joint 312 screwed above the third valve seat 311, a limit block 313 screwed on the swivel joint 312, a second accommodation space 314 formed inside the third valve seat 311, the swivel joint 312 and the limit block 313, and a second connection end face located in the upper part of the second accommodation space 314 with a gradually changing inner diameter. The second valve core 321 has a rod-shaped structure. The second valve core 321 is arranged in the second accommodation space 314, in clearance fit with the inner wall of the second accommodation space 314 and can abut against the second connection end face. An elastic member 322 is arranged between the second valve core 321 and the third valve seat 311, so that the second valve core 321 abuts against the second connection end face.

[0033] Under normal conditions, the second connection end face is in a V shape. Under the action of the elastic member 322, the second valve core 321 abuts against the second connection end face to ensure that the first valve 2 is in a cut-off state. During the oxygen filling process, when the fluid pressure in the limit block 313 is greater than the elastic force of the elastic member 322, it pushes the second valve core 321 to move to the side away from the second connection end face, and the second accommodation space 314 is the diversion channel, and the fluid enters the lower part of the second valve seat 212 along the second accommodation space 314, that is, the inflation of the oxygen bomb device is realized.

[0034] In addition, a third sealing ring 33 is arranged between the swivel joint 312 and the third valve group, and a fourth sealing ring 34 is arranged between the second valve core 321 and the third valve seat 311, ensuring the air tightness of the second valve 3.

[0035] On the top of the limit block 313, an oxygen filling ferrule joint 35 is also provided, which facilitates the connection of the oxygen bomb device to other auxiliary equipment, such as an inlet gas box and a pressure gauge. Without a union 312, the auxiliary equipment can be quickly connected through the self - contained oxygen filling ferrule joint 35, and multiple parameter data can be obtained in a timely manner. The data feedback from the auxiliary equipment can be used for adjustment.

[0036] In this embodiment, the overall material of the first valve 2 and the second valve 3 is made of 316L stainless steel with higher strength. Compared with domestic valves, it has stronger corrosion resistance and high - temperature resistance, and at the same time, its creep resistance is also well guaranteed, truly achieving no deformation under high pressure, meeting the requirements of the oxygen bomb device for carrying out combustion tests in a high - pressure environment inside the cylinder.

[0037] In addition, it should be noted that, in the above - described specific embodiments, the various specific technical features can be combined in any suitable way without contradiction. To avoid unnecessary repetition, the present invention does not further describe various possible combination methods.

Claims

1. A valve structure, characterized in that, Comprising: Inner enclosure (1), on which a first through-hole (12) and a second through-hole (13) are provided; First valve (2), the first valve (2) includes a first valve body sealed and installed in the first through-hole (12), and a first valve core (22) which is in a needle structure and arranged inside the first valve body; Second valve (3), the second valve (3) includes a second valve body sealed and installed in the second through-hole (13), and a second valve core (321) which is in a rod structure and arranged inside the second valve body; and the second valve (3) is a one-way valve.

2. The valve structure according to claim 1, characterized in that, The first valve body includes: a first valve seat (211) screwed into the first through-hole (12), a second valve seat (212) screwed above the first valve seat (211), a compression nut (213) screwed on the second valve seat (212), a first accommodation space (214) formed inside the first valve seat (211), the second valve group and the compression nut, and a first connection end face located at the bottom of the first accommodation space (214) with a gradually changing inner diameter surface.

3. The valve structure according to claim 2, characterized in that, The first valve core (22) passes through the compression nut (213) and can abut against the first connection end face; an air passage (221) is provided inside the first valve core (22) and extends to the outside.

4. The valve structure according to claim 3, characterized in that, A first sealing ring (23) is arranged between the first valve core (22) and the compression nut (213), and a second sealing ring (24) is arranged between the first valve core (22) and the upper part of the first connection end face.

5. The valve structure according to claim 4, characterized in that, An operating member (25) is fixedly installed on the top of the first valve core (22), and the operating member (25) can drive the first valve core (22) to move up and down.

6. The valve structure according to claim 1, characterized in that, The second valve body includes: a third valve seat (311) screwed into the second through-hole (13), a swivel joint (312) screwed above the third valve seat (311), a limit block (313) screwed on the swivel joint (312), a second accommodation space (314) formed inside the third valve seat (311), the swivel joint (312) and the limit block (313), and a second connection end face located at the upper part of the second accommodation space (314) with a gradually changing inner diameter surface.

7. The valve structure according to claim 6, characterized in that, The second valve core (321) is arranged in the second accommodation space (314), is in clearance fit with the inner wall of the second accommodation space (314) and can abut against the second connection end face; an elastic member (322) is arranged between the second valve core (321) and the third valve seat (311) to make the second valve core (321) abut against the second connection end face.

8. The valve structure according to claim 7, characterized in that, A third sealing ring (33) is arranged between the swivel joint (312) and the third valve group, and a fourth sealing ring (34) is arranged between the second valve core (321) and the third valve seat (311); an oxygen filling ferrule joint (35) is also arranged on the top of the limit block (313).

9. The valve structure according to claim 1, characterized in that, The first through hole (12) and the second through hole (13) are both stepped holes, and gaskets (14) are further arranged between the first valve body and the first through hole (12), and between the second valve body and the second through hole (13).

10. An oxygen bomb device, characterized in that, It includes the valve structure according to any one of claims 1 to 9.

Images